Golems

About Golems, for now ive just cant make up my mind to choose which is the best charge move perform as well in the most situation in the battle. I got both Golems which have Rock charge move for each their own (RB or StE) but i just cant decide the best in one of them to against Flying mons (and other types which one has weakness to Rock either). Help me guys. Thank for ur honestly advice 0:>
P/S: Both golems are female and they got same stat and has IV91% for each one (this is my 4th couple that got the same CP + Stat + IV).